Tektronix 2430 - Page 79

3-45
Figure 3-4. Simplified Peak Detector block diagram.
PO
HO L D PO
H O LD
M
A TRA CK P O TRAC K
DI SP LA Y D IS P L AY DISPLAY DI S PLA Y
A
X
P O HO L D PO
B
TRA CK PO T RAC K PO
DI SPLA Y DISPLAY DIS P LAY
P O HO L D PO H OLD
M
C P O TR A CK P O
D I SP L AY DI S PLA Y D I S P LA Y DISPL A Y
I
N
HOLD P O HO L D
0 TRA CK PO TRACK P O
DIS PLA Y D ISPLA Y D I S P LAY
PD 2
POl
HO LD
T RA C K
FA S T PEAK DE TEC TOR
CA L I
CAL
CAL
SIG
SIG
49 1 7-2 1
PD O S 13
MIN
S I GN A L
OUT3
P EAK
DE T E C TOR
CLO CKS
OUTl
SIGNAL
MA X
PDOS 1 1
rvYY'rvYY'
1 5 1 6 1 4 17
l
[
PEAK D ET ECTORS OU T PUT MULTIP L EXORS
A A
/ /
43
+
PDA
f,
BANDIiIDT H
PDA
S L OII
SLOII
44
FILTERS
FAST
MA X FAST
~ CAL OFFSE T
M A X
27
;-- -
T H
R E S E T
r- 2
SE L
!!
I
7 5fl
+
P D B
'-1
+
4
SLOII
26
P DB
S L D II
+
FAS T
MA X FAST
28
-
6
75fl
MA X
-
I~- 0
T
H
R E S ET
f--1
S E L SEL
+~
t !
I
1 P O l
INP UT
o -r-;:;-
2 3
B U F FE R
1-
z
AM P L
2 -
:>:
P D2 36
-
7 5fl
3 - "::"
T
+
8
+
P D C
SEL
SLOII
75fl
PDC
S L O II
1
33
-
1 0
FAS T
+
M IN FAST
MI N
3 5
~
-
-
I
T
H
RESET
--0
SEL
,---- 0
S I G
1 2
!!
I
+
POD
~ C AL O FFS ET
S L OII
POD
SL O II
34
FAST
M IN F A ST
MI N
L__
-
T -T RA C K M O D E
T H
R ES E T
-- 3 S EL
H - HO LD M O D E
t t
I
3 1
--
22
SL OII /FA S T
C431
L530 L 531
Theory of Operation-2430 Service